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Mercury | 300 Hour Service Kit | 150 EFI 4-Stroke | 8M0094233

*Please be advised, Mercury has made updates to this kit and it no longer includes the water pump housing.*

The Mercury 150 EFI 4-Stroke 300 Hour Service Maintenance Kit – 8M0094233 includes the essential components required to complete the recommended 300-hour maintenance interval on Mercury 150 HP EFI four-stroke outboard engines. This comprehensive kit provides the necessary oils, filtration components, ignition parts, cooling system components, and wear items needed to maintain dependable engine performance.

The 300-hour service interval is one of the most important scheduled maintenance milestones for Mercury outboards. Replacing the spark plugs, fuel filters, thermostat components, belt, and water pump parts helps maintain cooling efficiency, fuel delivery, and ignition performance while protecting critical engine components from wear.

What’s Included in This Kit

• 1 x Gallon 10W-30 Synthetic Blend Engine Oil
• 3 x Quarts 10W-30 Synthetic Blend Engine Oil
• 1 x Quart Gear Lube
• 1 x Oil Filter
• 1 x High Pressure Fuel Filter
• 1 x Low Pressure Fuel Filter
• 2 x Gearcase Drain Seals
• 4 x Spark Plugs
• 1 x Thermostat Kit
• 1 x Belt
• 4 x Anodes
• 1 x Water Pump Repair Kit

Benefits of the 300 Hour Service

• Maintain optimal lubrication with fresh 10W-30 synthetic blend engine oil.
• Ensure clean fuel delivery with new high and low pressure fuel filters.
• Restore ignition performance with four replacement spark plugs.
• Maintain cooling system efficiency with a new thermostat kit and water pump repair kit.
• Protect internal components with a new oil filter and gearcase seals.
• Maintain accessory drive performance with a replacement belt.
• Reduce corrosion with replacement anodes.

Engine Compatibility

• Mercury 150 HP EFI 4-Stroke Outboards

Always verify your Mercury outboard model and serial number before ordering to ensure compatibility with your engine.

• Engine Application
  • 150 HP EFI SeaPro - 2B139139 and up
  • 135 HP EFI - 2B131942 and up
  • 105 HP EFI Jet - 3B672358 and up
  • 150 HP EFI - 1B905505 and up